Looking to synchronize files between multiple devices with Kodi

Hi,

I had done some kodi addon development in the past

I want to help a friend to make this kind of addons:

He will like to make a service that synchronize favorites, video restore point, playlist, iptv and epg files among many devices he own.

In the config of the service, he will determine which device will be the master ( to send the files) or the slave (receive the file).

The service of kodi will store on a "cloud" ideally all the master files of a user.

By example, a PC will contain the master for the favorites and a tablet will contain the master for the playlist

The synch of the files will be done when you launch kodi on a device, so the Dropbox will be read and the devices will receives all the master files at once.

The goal is to make sure that all the devices contain the last version of their master file among them

I will like a solution like Dropbox, because it would more flexible more specifically with video restore point.

The user by example can watch a movie then stop it, the next day, he continues at the same restore point on his phone and at lunch time he can continue with wifi and finish when at home, on the android tv box

I will program it with Python 2.7

I need a bit of help to make this happen.